<div class="container">
  <div class="item item--1">a</div>
  <div class="item">b</div>
  <div class="item">c</div>
  <div class="item">d</div>
  <div class="item">e</div>
</div>
/* -------- Skip this base code -------- */
* { box-sizing: border-box; } .container { display: grid; gap: 1px; padding: 1px; border: 16px solid silver; } .item { padding: 8px; color: white; background: coral; } .item--1 { background: royalblue; }

.container {
  grid-template: 'a a b' 80px 'a a c' auto 'd e f' / 160px 1fr auto; /* ⬅️ */
}

.item--1 { grid-area: a; }

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.